How to set fast the same customizations that i had in the previus versions of Blender?
Just copy the preferences files to the new version. 
Look for the userpref.blend of the old version and copy it to the folder of the new one.

In Linux is usually in /home/yourusername/.config/blender/version number/config.

For Windows it should be in \users\ your user name\AppData\Roaming\Blender Foundation\Blender\ version number \config.